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FIB
Freight Forwarders’ Associations; office, CH-8050
Zurich] (Int.).
FIB Forwarding information base.
FIBDATD “Fix it but don’t alter the drawings”.
Fiberloy Family of composite materials based on boron
fibres bonded in various resinous or plastics adhesives
(Dow Chemical).
FibeX Computer-placed carbon-fibre epoxy (Spectrum).
fibre Word used loosely of FBL and other systems
employing optical fibres for all data transmission [US
fiber].
Fibredux Family of CFRP and hybrid prepreg resins
(Ciba-Geigy).
Fibrefrax H High-temperature ceramic-fibre insulating
material, available as bulk fibre, blanket, felt or paper.
Fibreglass Glass-fibre, either raw fibre (many forms) or
bonded into matrix and moulded or otherwise formed
[capital F in UK, in US fiberglass].
Fibrelam Plastic honeycomb sandwich panel mechanically
resistant to spike heels and not affected by galley or
other spillage (Ciba/Geigy).
fibre optics Branch of optics concerned with propagation
of light along thin fibres each comprising core and
sheath of different glasses or other transparent material;
light entering one end is transmitted by successive internal
reflections. In practice extremely fine fibres a few microns
in diameter are made up into bundles of 100,000 or more.
fibre-optics gyro Instrument (not a gyro at all) for
measuring rotations by means of coherent light passed
simultaneously both ways around a loop (typically
300–500 m long) of monomode optical fibre, rotation
being measured instantly and precisely by phase shift at
output.
fibrescope Fibre-optic borescope.
Fibs, FIBS Flight information billing system.
Fibua Fighting in built-up areas.
FIC 1 Flight information center, or centre.
2 Finance committee (ICAO).
3 Film integrated circuit.
4 Flying [or flight] instructor course.
5 Frequency/identification/course.
6 Flight inspection computer, compares aircraft
position with that derived from navaids.
Fican Federal Interagency Committee on Aviation
Noise (US).
Fick’s law Basic law of gaseous diffusion: mass flux j =
diffusion coefficient D times differential dC 1 /dy where C 1
is concentration of gas 1 and y is distance from surface.
Ficon Fighter conveyor, fighter carried to target by large
bomber, to offer protection (USAF).
Fidag Federazione Italiana Dipendenti Aviazione
Generale.
fidelity 1 Accuracy with which electronic or other
system reproduces at output essential characteristics of
input signal.
2 Handling * is degree to which flight simulator replicates
handling of real aircraft.
FIDO 1 Flight dynamics officer.
2 Fog Investigation and Dispersal Operation, UK
method of dispersing fog in WW2 by burning fuel along
runway edges.
3 Field integrated design and operations (Mars vehicle).
Fids, FIDS 1 Fault identification and detection system.
field traffic
2 Flight information display set [ATC radar] or system
[for passenger information].
3 Fire detection and suppression system.
fiducial marks Index marks on camera which form
images on negative to determine position of optical centre
or principal point of imagery; collimating marks.
FIE Flight instrument examiner.
field 1 Airfield, as in * length.
2 Region of space within which each point has definite
value; examples are gravitational, magnetic, electric,
pressure, temperature, etc. If quantity specified at each
point is vector, field is said to be vector *.
3 Customer service, thus * service, * rep, * report.
4 Operation at advanced base with austere facilities
(military), thus * maintenance.
field alignment error In ground DF station, error introduced
by incorrect orientation of aerial elements.
field coils Two fixed coils of DF goniometer at right
angles to each other and connected to two halves of aerial
system.
field extension Organizational element performing
operating functions that must be retained under direct
control of parent staff office (USAF).
field-handling frame Portable frame attached to airship
on ground to afford grasp to large handling crew.
field inventory Portfolio of used aircraft, parked and
immediately available.
field length Distance required for takeoff and landing,
accelerate/stop, RTO and other operations as specified in
flight manual (see balanced *).
field maintenance That authorised and performed in
field (4) in direct support of operational squadrons and
other units; normally limited to replacement of unserviceable
items.
field modification One made in field (4), usually by
FMK.
field of regard Total angular coverage of sensor; with
fixed installation same as FOV (2, next), but if gimballed
depends on FOV plus slewing and elevation limits.
field of view 1 Angle between two rays passing through
perspective centre (rear nodal point) of camera lens to two
opposite sides of format. Not to be confused with angle of
view.
2 Total solid angle available when looking through
sight, HUD or other optical system. In the case of a TV,
FOV is defined as: wide, 4°; narrow, 0.9°; underscan,
0.45°.
field operation From forward airfield, esp. with unpaved
runways.
field performance That associated with takeoff and
landing, esp. in context of certification.
field site Completely unprepared stretch of terrain used
in Harrier training.
field strength 1 Flux density, intensity or gradient; also
called field intensity, although this term does not follow
strict radiometric definition of intensity (flux per unit
solid angle).
2 Electric field strength, units Vm -1 .
3 Signal strength; magnitude of electric or magnetic
component in direction of polarization.
4 See magnetic *.
field takeoff From airfield, not ship or catapult [naval
a/c].
field traffic Surface vehicles on airfield.
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